Use a differential pressure instrumentation function to measure level

You can measure level through a differential pressure function. To do this, reclassify the level instrumentation function into a differential pressure instrumentation function. User expertise is required to correctly classify the function according to the connection between the level instrumentation and the equipment.

Prerequisites

• Create a level measurement in P&ID

Use a differential pressure instrumentation function to create a level measurement

1. Select the level instrumentation function and then select Reclassify and set it to the Differential Pressure Instrumentation Function class.

   

   The differential pressure instrumentation function object provides access to the main components of this measurement configuration, including the pressure sensor and a pressure transmitter. If the level instrument function object is not reclassified, these components are not available as valid options for creation.

Add a pressure element

Add a Pressure Element part to translate the differential pressure produced in the equipment.

2. Drag and drop the Pressure Element part from the from the Instrumentation – Instrument Function Parts palette onto the canvas, and then select the item the element belongs to.

   

   The value automatically appears in the Sensor (DP) column.

   

Add a pressure transmitter

3. Drag and drop the Pressure Transmitter part from the from the Instrumentation – Instrument Function Parts palette onto the canvas, and then select the item the element belongs to:

   

   The value automatically appears in the Transmitter (DP) column.

   

   Note: Since the Sensor and Transmitter columns reference a Level Sensor and Level Transmitter which is not relevant for this type of arrangement object, they do not need to be populated.